Sadiron



Dee- 8, 1931- Avl o. sAMUELs ET AL Y 1,834,971

SADIRON Filed May 21, 1930 [N'VENTORS contains few parts a to get out of order, and in which the thermo.-

iron, as near as iron illustratin Patented Dec. s, issi- "UNITED STATES-@Parnu T0 BAISONUNITED OOBPQBATION, A0l' MQEESIEB, NEW YORK, WBYOBATION 0l nnmiwann BIDIBON Animation med any ai. issu. semi no. mea

statically controlled', that is, means are pro-v vided for breaking the electric circuit through the heating unit when a given maximum temperature is attained.

The principal object ofthis invention is to rovide an iron of this kind which is simple in construction, inex nsive to make, which d hence is less liable static control is more \reliable than in. irons heretofore constructed.

Another object of the invention is to con- -struct an iron of this kind in which the thermostat element adjacent the base of the ssible to the working surface of the iron he temperature of which is to be controlled uniform control at the esired int.

A further object of the invention is tocpn# .struct an iron of this kind in which the spring which coo rates with the thermostat element is adiustable toward and from the thenmostatic e ement to va the maximum temperature to which 'the iron may be heated, means being provided on the opposite side of the spring for adjusting it toward the thermostatic element, thus securing positive control and uniformity of o eration.

To these and other ends t e invention consists in the construction and arrangement of parts that will appear from the following description when read inrconjunction with the accompanying drawings; the novel featuresfbeing pointed out-in the claims following the s ification.

nthe rawings: Fi 1 is a side elevation of an electric sad one embodiment of the invention', parts eing broken away to expose underlying parts;

Fig. 2 is an enlarged fragmentary longitudinal section showing how the thermostatic element and its cooperating adjustable spring are mounted;

Fig. 3 is a fragmentary plan view of the t ereb ,thus securingmorev vsimilarly threaded in t same on substantially the same scale as Fig'.1

Fig. 4 is a sectional view taken substantiall? on line 4-4 of Fig. 2 and looking in the irection of the arrow at said line, and

Fig. 5 isa fragmentary sectional view taken substantially on line 5-5 of Fig. 1 and lookin in the direction of the arrow at said line` eferrin moreparticularly to the drawings, in w ich similarv reference numerals 4re er to the same parts in all the figures, the reference numeral 1 indicates the base or shoe of the sad iron which is or may be of anyA usual or preferred construction. Secured-t0 the base by any suitable means, such asstuds,

isa clamp plate 2 which is made hollow or has a cut-out portion 3 on its underside to provide a housing for the working parts.

he shoe and clamp .plate may be constructed of cast iron, or other suitable material.

Arran d on the base 0r shoe within said housing is a heating element 4 which has an open center andrests in contact with the upper surface of the clamp plate, and is connected with a suitable source of electric cur- A rent through the conductors 5 and 6 connected therewith by means of the bindin posts 7 and 8. The conductor 5 is connec with one of a pair of connecting posts 9 mounted on a bracket 10 which has a forwardly extending portion 11 seated in a depression 12 in the upper surface o f the clamp plate to which it is secured b means of a threaded in a tapped opening in the. shoe. The stud`13 passes through openings provided therefor in the clamp late, and also serves to secure the rear endJ of the clamp plate and a hood and also the rear end of the' andle 14 to the shoe or base. The front end fics y,

aan o. ummm .um atacaron L. wamn. or nocnn's'rm imw remi, assurons nut threaded on the upper en of a stud 13 f of the handle 14, the clamp' plate and the90 hood are secured to the base by means of a nut threaded on the upper end'of a stud 15 e base or shoe.

The lconductor 6 extends forwardly from the post 8 and at its forward end is connected with an ear 16 projecting upwardly from the side of the rear end of the thermostatic ele. ment 17. The thermostatic element has an opening whereby it is arranged on a central projection 18 on a block 19, from whence it Vio - openings in the blocks 23' and 19 and -spaced and insulated from each 22 is engaged. It also has a downwar extends forwardly and at its forward end has a contact point 20 arranged on its upper surface. rlhe block 19 is of non-conducting material, and by this arrangement serves to support and insulate the thermostatic element'spaced from but closely adjacent the upper surface of the shoe.

rlhe contact 20 cooperates with and is normally in contact with an opposing contact point 21 carried on the end of a spring 22. The spring 22 extends rearwardly from its contact point, and at its rear end has an opening whereby it is mounted on a block 23 supported on the block 19 and the thermostatic element. The block 23 is of non-conducting material and serves to separate or space the spring from thethermostatic element, and the blocks 19 and 23, and the thermostatic element 17 and spring finger 22 are secured -to the shoe by means of a screw 24 which passes through a washer 25 on the spring 22, an enlarged vopening in the sprinof 22, and

a tapped opening in the shoe. By this construction, the parts are secured to the shoe by a single securing means, the thermostatic element 17 being spaced and insulated from the shoe by the block 19, and at their rear ends the thermostatic element and the spring are other by means of the block 23, the whole being housed in the clamp plate 2. The screw 24 and washer 25 are insulated from the finger 22 by an insulating element 25'.

It is desirable to secure the thermostat-ic yelement and the spring 22 in longitudinal alinement with each other. To this end, the block 23 ,is provided with projections or flanges 27 and 28 between which the s ring projection 29 which en ages one side of the thermostatic element l By this arrangement, possible accidental disalinement of the parts is prevented since the flanges 27, 28 and 29 prevent relative rotation a out the screw as a center, which screw provides a means for firmly clamping the parts to the shoe.

The spring. 22 has an upwardly projecting flange 31 at its rear end, whereby it is connected with one of the posts 9 by means of a conductor 32. Normally the parts are in the position shown in Fig. 1 of the drawings, in which the contacts 20 and 21 engage each other, and the circuit through the sprin; 22

,and the thermostatic element 17 is close its contact 20 from engagement with the contact 21 on the spring 22 to break the current engages aseaevl and prevent further heating of the shoe. As the shoe cools, the element again moves toward and into contact with the contact 21, and reestablishes the circuit through the heating unit. By this arrangement, a substantially uniform temperature may be secured in the shoe for a given class of work, and any danger pf overheating the shoe is prevented.

1n performing d'erent classes of work with the iron, di'erent temperatures are required for greatest efficiency, such as the nature of the goods, as cotton, silk or wool, also the moisture content, and it is therefore desirable that means be providedv for varying the temperature at which the circuit is broken. To this end, the spring 22 and thermostatic element are provided with alined openings intermediate their ends in which a screw 34 is arranged out of contact therewith'and at its lower end engages a tapped opening in the shoe. Arranged on this screw `and seated in the opening in the spring 22 is a block or ring 35 of'non-conducting material, and the screw 1s enlarged or shouldered at 36 to engage this ring, ora washer 37 arranged between'the shoulder and the ring. It will be-noted that by this construction, Vthe shoulder on the screw serves as a stop ,for the spring arm 22 and turning the screw in one direction threads it into the shoe and moves the shoulder or stop 36 against the ring 35 and moves it against the spring or resilient member 22 and flexes it to move its contact point 21 toward the contact point 20 so that greater heat action or a higher temperature is required to separate the contact points. When the screw is turned in the opposite direction, the contact point'2l moves in the opposite direction by virtue of the resiliency of the spring 22 and a lower maximum temperature of the shoe is required to separate the contact points.

Convenient means accessible from outside the hood are provided vfor turning the screw to vary the position ofthe Contact point 21.`

At its lower end, the sleeve 41is threaded which has a recess in its upper face in which a collar 43 is seated, which has a laterally projecting annular flange 44 which rests on the upper side of the nut 42. The sleeve 41 is slotted at 45 for cooperation with a lug 46 on the flange 44, whereby the ring or collar 43 engages the sleeve 4l to rotate therewith. The flange 44 also has an outwardly project- .externally and has a nut 42 threaded thereon A Y nient, 1t rcceivcsthe heat directly therefrom ing lug 47 which engages one side or the other of a fixed lug 48 depending from the hood or casing 49 arranged on the. clamp plate. By

\ this arrangement, rotation of the screw 34 is limited to less than a complete revolution, and only a limited range of adjustment of the contact 2l relatively to the contact 2O is j provided. Means are provided for retaining the screw 34 in adjusted position. Said means comprises a spring in the form of a split ring 51 which is arranged on the flange 44 and frietionally engages the inner wall of the hood 49.

By arranging the thermostatic element 17 adjacent thev shoe and within the heating eleand is more sensitive to temperature changes therein than is the case when otherwise arranged. The adjustment of the spring 22 is positive and provides a means for regulating the maximum temperature of the shoe and uniformly maintaining such temperature. Anelectric sad iron constructed as above is simple in construction, contains ewparts,

and is adapted to maintain a uniform maximum temperature at all times. I

Although only one embodiment of the invention is described herein, it will be understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claims.

We claim:

l. The combination of a support, a thermostatic element rigidly secured at one end to the support and having an opening intermediate its ends and arranged adjacent the support, an elect-ric contact mountedon the other end of said thermostatic element, a resilient arm also rigidly secured at one end to the support and arranged above the thermostatic element and having' an opening intermediate its ends in alignment with the and having an opening intermediate its ends,

the thermostatic element being `located between the support and the resilient arm, a second electric contact on the other end of said resilient arm adapted to cooperate with the first mentioned contact, and means extending through said opening in the'resilient arm and adj ustably engaging the support for flexing said arm to move its contact toward the lirst Amentioned contact. In witness whereof, we have hereunto signed our names.

ABE O. SAMUELS.

MAURICE L. WARNER.

opening in the thermostatic element, a second'electric contact on the other end of said arm adapted to cooperate with the first mentioned contact, and means arranged in said aligned openings and engaging the support for ilexing said arm to move lts contact tov Ward the first mentioned contact.

2. The combination of a support the `temperature of which is to be controlled, a thermostatic element rigidly secured at one end to the support and having an opening intermediate its ends and arranged adjacent to the support, an electric contact mounted on the other end of said thermostaticelement, a resilient arm also rigidly secured at one end to the support and arranged above the thermostatic element and having an opening intermediate its ends in alignment -with the openingin the thermostatic'element, a second electric contact on the 'other end of said arm adapted to cooperate with the'first mentioned contact, adjustable means arranged los; 

